Display screen or portion thereof with a mixed reality graphical user interface



FIG. 1 shows a display screen or portion thereof with a first embodiment of a mixed reality graphical user interface;

FIG. 2 shows a display screen or portion thereof with a second embodiment of a mixed reality graphical user interface;

FIG. 3 shows a display screen or portion thereof with a third embodiment of a mixed reality graphical user interface;

FIG. 4 shows a display screen or portion thereof with a fourth embodiment of a mixed reality graphical user interface;

FIG. 5 shows a display screen or portion thereof with a fifth embodiment of a mixed reality graphical user interface;

FIG. 6 shows a display screen or portion thereof with a sixth embodiment of a mixed reality graphical user interface;

FIG. 7 shows a display screen or portion thereof with a seventh embodiment of a mixed reality graphical user interface;

FIG. 8 shows a display screen or portion thereof with an eighth embodiment of a mixed reality graphical user interface;

FIG. 9 shows a display screen or portion thereof with a nineth embodiment of a mixed reality graphical user interface;

FIG. 10 shows a display screen or portion thereof with a tenth embodiment of a mixed reality graphical user interface; and,

FIG. 11 shows a display screen or portion thereof with an eleventh embodiment of a mixed reality graphical user interface.

The outermost long dashed double-short dashed broken lines show the field of view for the display screen or portion thereof, and form no part of the claimed design. The remaining broken lines illustrate the graphical user interface or a mixed reality environment, and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a mixed reality graphical user interface, as shown and described. 